Murni P. Raising pH of Red-Yellow Podsolik Soil by Adding Ashes and its Relation to Nitrogen Fixer Microorganism Acitivities. Biospecies [Internet]. 2012 Sep. 11 [cited 2026 Apr. 23];2(2). Available from: https://www.online-journal.unja.ac.id/biospecies/article/view/251